Gasket for water-gages.



PATENTED 001*. a, 1903. H. K. GILBERT. GASKET FOR WATER GAGES.

APPLIUATION FILED MAR. 24, 1903.

N0 MODEL.

SWIM

UNITED STATES,

PatentedOctober 6, 1903.

PATENT OFFICE.

HENRY K. GILBERT, OF NIAGARA FALLS NEW YORK, ASSIGNOR OF ONE-- THIRD TOFRANKLIN J. ROBINSON, O F HYATTSVILLE, MARYLAND.

GASKET FOR WATER-GAG ES.

SPECIFICATION forming part of Letters Patent No. 740,640, dated October6, 1903.

' Application filed March 24. 1903.

Serial N..'149.325. (No model.) 7

To all whom it iii/cry concern.-

Be it known that I, HENRY K. GILBERT, a citizen of the United States ofAmerica, and a resident of Niagara Falls, in the county of Niagara andState of New York, have invented certain new and useful Improvements inGaskets for Water-Gages, of which the following is a specification.

This invention relates to certain new and useful improvements in gasketsfor sightglasses, water-gages, &c.; and it has for its object, amongothers, to provide an improved gasket capable of expansion with greaterease and which shall be less liable to break the glass while beingexpanded or compressed. I have found from repeated use and experimentswith the rubber gaskets now in use that the portion thereof which formsthe packing being substantially rectilinear does not compress so readilyas is desirable in orderto form a steam and water tight joint.Furthermore, in largegaskets the resistance offered by the large amountof rubber in this packing portion of the gasket tends to break the glassupon which it is .used. I overcome these objections by making thepacking portion of my gasket bulbous or globular, having found fromexperience that this form yields more readily to compression, makes abetter and tighter joint, and avoids all dangerof breakage of the glasscaused by expansion of the gasket and the glass. Furthermore, the newform of gasket can be more easily adjusted from the glass into the boxWithout cutting or di'fficulty. In addition to the above advantages thegasket does not contact with the walls of the packing-nut except at theouter edge of the bulbous portion, thus leaving greater room forexpansion and in this way lessening the danger of breakage of the glass.My new form of gasket is much easier to compress, and the joint isformed more perfect, and there is less wear onthe gasket, thusincreasing its durability and usefulness.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined bytheappended claims.

The invention is clearly illustrated in the is ofibulbous or globularform.

accompanying drawings, which, with the numerals of reference markedthereon, form a part of this specification, in which- Figure 1 is alongitudinal section substantially central through a portion of asightglass, showing my invention applied. Fig.

2 is a perspective view of the gasket removed. Fig. 3 is a longitudinalsection showing the gasket of a slightly-difierent form from that seenin Fig. 1. Fig. 4 shows in elevation a portion of the sight-glass with adifferent form of gasket applied thereto, the latter being shown insection.

Like numerals of reference indicate like parts throughout the severalviews.

The invention in its broadest sense involves a gasket of rubber oranalogous material having it packing portion of bulb form. This genericidea is capable of embodiment in a variety of forms, the preferable onesof which are herein illustrated.

' Referring to the details of the drawings, 1 designates the main orbody portion of the gasket, that constituting the packing portion, andthis, as seen in the various views,

It has projecting from either side the tubular portions or flanges 2,which are relatively thin and which are designed to snugly embrace thesight or other glass 3.

The globular portion 1 may be solid, as seen in Fig. 1, or it may be, asshown in Fig. 3, partially hollow upon its inner face, so as to leavethe space 4 to give greater elasticity v to the portion 1 and permit ofits being more easily compressed, so as to expand it within thepacking-nut and form a tight joint.

In the form seen in Fig. 4 the body portion 5, from which project thethinner or flange portions 6 to snugly embrace the glass 3, has 0 itsouter wall formed upon opposite inclines 7, extending from oppositeedges toward the center to form an annular recess or groove, withinwhich is placed the separate ring or body portion '8, the portion ofwhich extending beyond the peripheral edge of the portion 5 constitutesa bulbous or globular packing portion, which I consider the equivalentof the packing portions 1 in Figs. 1, 2, and 3.

It is proposed to make the gaskets of difiercut sizes, so as to adaptthem to glasses of different diameters.

The gaskets may be applied to the glass in any of the Well-known ways, agasket being shown in position in Fig. 1 With the globular or bulbousportion held in the chamber 9 within the packing-nut: 10, being confinedbetween the flange 11 on such packing-nut and the lower end 12 of thenipple 13, to the lower threaded end of which said packing-nut isadju'stably attached. From this View it will be seen how the packingportion of the gasket is readily compressed to form a tight joint, andit will also be observed that the greater portion of this bulbous part 1is out of contact with the walls of the packing-nut, against which itbears only at the extreme outer periphery, the greatest diameter of saidpacking portion resulting in the advantages hereinbefore enumerated. InFig. 1, 14 represents a tube extending within the glass, its upper endbeing supported upon a gasket 15, the depending portion 16 of which isinterposed between said tube let and the glass 3 to prevent said tubefrom coming into contact with the glass.

From the above it will be seen that I have devised a simple, cheap,novel, and efiicient form of gasket admirably adapted for the purposesfor which it is intended, and while the forms herein described and shownare what I at the present time consider the preferable one it is evidentthat the same is subject to changes, variations, and modificationswithout departing from the spirit of the invention or sacrificing any ofits advantages,

and I therefore do not wish to be restricted to the exact form hereinshown and described, but reserve the right to make such changes,variations, and modifications as come properly within the scope of theprotection prayed.

In order that the gaskets may be made to serve with the various-sizedpacking-nuts already in use, I propose to make the gaskets with thebulbous portions of varying diameters and fitnesses, as will be readilyunderstood.

What I claim as new is 1. As an improved article of manufacture, anelastic gasket having a packing portion and a flange, said portionhaving an annular groove.

2. As an improved article of manufacture, an elastic gasket havingglass-embracing flanges, and a portion intermediate the same, saidportion having an annular groove, as and for the purpose set forth.

3. As an improved article of manufacture, an elastic gasket having aflange and a portion at one end of said flange of greater thickness thanthe material of the flange and said portion having a portion of itssubstance removed annularly.

4. As animproved article of manufacture, an elastic gasket having aflange and a portion at one end of said flange of greater thickness thanthe material of the flange, said thickened portion having an annulargroove.

Signed by me at Washington, District of Columbia, this 23d day of March,1903.

HENRY K. GILBERT.

Witnesses:

E. CATESBY RoWZEn, E. H. BOND.

